Steam-boiler



(No Model.) 2'sneetssneen 1.

MQN. LYNN. y STEAM BOILBR`l l NO. 377,460'. Patented I'b. 7, 1888.

' miba/asses. l ,fuiven-201. l

M t' Haw. Q aff@ v l 71,123 Jorneys NA PEYERS, Photo-Litlwgmpber. Washingwn. D. C.

M. M. LYNN. STEAM BOILER. Y y Y Pate ted'Feb. 7, 1888.

(No Model.) 2 sheets-sheet 2.

UNITED STATESV PATENT (DEFICE.'L

ENGINE COMPANY, or DAYTON,

OHIO.

nsI'laAM-eolLEl.

SPECIFICATION forming part of Letters Patent No. 377.460, dated February '1, 188s.

Application filed December 2B, 1886. ASerial` NOHQQKQOS. (No model.)A

Y I y Y To all wwmvb may concern:

Be it known that I, MIRABEAU N. LYNN, of Rising Sun, in the county of Ohio and State of Indiana, have invented certain new and usefulv Improvements in Boilers; and I do herebyV declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, and to the figures and letters of reference marked thereon.

This invention relates to` improvements in boilers, more especially that class employed upon vessels, and comprehends certain novel constructions and combinations of parts, resulting in the production of asimple and convenient structure whose center of gravity is low and generating capacity high as compared with other forms of Vboilers occupying an equivalent space.

Referring to the accompanying drawings,

wherein my said improvement-s are illus- Y vation with a portion of the vertical rear 25.

trated, Figure 1 representsa longitudinal sectional view of the boiler; Fig. 2, a front ele- Wall broken away. Fig. 3 is a view in elevation of the rear end of the boiler. Fig. 4 is a top plan view of the boiler. Fig. 5 illustrates a modified form of conductingfstud.

Similar letters of reference in the several figures indicate the same parts. f

My improved boileris composed ofthreeY sections, so called-rst, the front or horizontal section, A; second, the rear or vertical hollow wall, B, and, third, the series of generating-tubes C.

The front section, A, consistsof an arched boiler or jacket comprising the inner and outer platesor water-walls, a, aheads a2 c3 riveted thereto, and interposed plates or anges along the lower edges, the two heads a2 a3 being also provided with corresponding openings for thev reception of the door-frame a4. Atasuitable distance from the front wall or head -of the arched boiler, and within the latter, is located the fire wall or bridge a5. The bridge a5 yis preferably made hollow, as shown, with a vertical front wall and curved or inclined rear wall, and is provided with a ledge or rest, a, upon which the rear ends of the grate-bars a.7 are supported, the opposite extremities of said bars resting upon abar, as. The hollow bridge a5 is provided with a series of perforations, 1

a9, below the grate-bars, for the admission of air, and a second series of openings, al, Vat the top, and preferablyin rear of the upper edge, through which the heated air is delivered and distributed. 1 The section B of the boiler consists, essentially, of a hollow wall or column standing vertically in rear of thesection A.` This hollow wall or column, preferably composed `,of two waterfplates, bb', and intermediate plates,

b2, securely united or riveted together, asindicated, is much higher,- but of substantiallyv the same width as the section A, so that whenv the rear edges of the water-platesa a are r1veted tol the/front plate, b-, the-lower portion of theis'ection B will vconstitute the rear wall of the re box vor chamber. sage, bpreferably arch-shaped, is formed in. the lower end of the section B, through which the products of combustion and flame generated in the combustion-chamber are con ducted into the uptake or due-space.

Thenjthird section, C, comprises a series of An opening orpastubes, c, secured to and extending rearwardly from the wall B and projecting into/the'up-v y take or iiue-space referred to.- The tubes-c are threaded into and passed through the front and rear walls or plates of the section B, the rear ends beingv closed by capscf and thefront ends by caps c2, which serve both as paekings andjam-nuts.

when in place, occupy a positionb'etween A ser-ies of perforations, c", are 'I formed in that portion of the tubes c which, 8K

the.walls b b and within the chamber formed in section B, thus establishing communication each tube.. p v

One or more series of tubes c at thetop of the section B are connected by branch pipes between the said chamber and theinteriorv of I e4 with a pipe, c5, arranged above the series of y tubes c and within theV uptake, said pipe c5 constituting the delivery-pipe and performing, in part atleast, th'eoffice of a steam-drum.

Communication is established'between theA chambers inV sections A andB throughopenp ings or passages b7 and such of the'tubes c as proj ect between the plates a a of the section A, the front ends of said-tubes being left open. v for this purpose. l y' Upon each*side and in rear of the vertical section B are arranged vertical plates or walls, which, in connection with the section B, form the uptake or passage through which the heated gases and products of combustion are conducted to the chimney or smoke stack; and it is into said passage or uptake that the tubes c project, so that the latter, as well as the vertical wall or section B and supply-pipe c5, are subjected to the heating action of the gases and products of combustion.

The improved boiler constructed as described constitutes a simple, economical, and efficient steam-generator.

The supply of water in the boiler when in use is maintained at or about the level of the third or fourth series of tubes c, counting from the top of section B; hence the chamber in section A is iilled,as well as the lower portion of section B and most ofthe tubes c in section C. rIhe weight of water thus distributed, in conjunction with the disposition of the material of the boiler, brings the center of gravity very low, which is particularly desirable when the boiler is designed to be used upon a steamlaunch or other vessel. Moreover, by the employment of the vertical section B at the rear end of the horizontal section and the tubes c, projecting into the uptake, of which the said section B constitutes one wall, alarge generating-surface is provided wit-houtunduly increasing the weight or space occupied by the boiler, and at the same time the steam generated in the boiler, and which occupies the interior of the upper series of tubes c, is maintained at a high temperature, but a' small section of this steam-space-the outer face of section B-be ing removed from the heating-chambers. The tubes c, screwing into both walls or plates of the vertical boiler B, serve the purpose of stay-bolts, and as both ends can be uncovered they can be readily cleaned when desired.

Although, as before mentioned, the boiler described is very efficient, its generating capacity can, as I have discovered, be greatly augmented at relatively slight expense and without involving any material increase in the weight or space occupied. The means whereby this increased generating capacity is attained consists, essentially, of a series of conducting pins or studs s, passing through and uniting the water-walls a aA of section A, their inner ends being prolonged into the fire-chamber. rlhese pins s constitute the stay-bolts for the boiler-section A, and their projecting ends serve as conductors for transmitting heat to the water-walls, as described in my prior application,while the portion of the said bolts s which serves to unite the inner and outer waterwalls, a a', affords a supplemental generatingsurface, maintained at a high heat by conduction from the end projecting into the fire-chamber, which end is raised to a much higher de gree of temperature than the inner water-wall, notwithstanding the fact that the said wall, as well as the studs s, are subjected to the heating action of the same fire. Instead of einploying solid pins or studs s to perform the offices of stay-bolts and supplemental heaters,

tubular stay-bolts may be used, as shown in f Fig. 5, the inner ends of said tubular staybolts being open. while the `outer ends are closed by caps s. The stay-bolts sare threaded into openings inthe water-walls, and are preferably inserted froml within the boiler andl screwed up tight to their seats at the base of the threaded section, after which the caps s are screwed down tight on the outer projecting ends, forming both a jam-nut and packing. Similar provision is made for increasing the generating capacity of the tubes c in the lower portion of section C of the boiler. In this case each tube c is provided with a series of conducting-pins, s, projecting radially through the walls of the tubes, as shown, so that the enter ends will serve as conductors and the inner ends as supplemental generators.

In order that the tubes c may be the more readily cleaned when the cap is removed from either or both ends, the conducting-pins .s2 are so disposed and arranged as not to occupy the extreme lower portion of the inner walls of the said tubes, leaving a clear space at this point for the passage of the flue cleaning or scraping device.

For the conveniencein inserting and removing the tubes c when provided with conducting studs or pins s2, as described, the said pins are disposed radially onv opposite sides of the tubes, leaving the top and bottom surfaces plain, so that each tube can be rotated without coming in Contact with the pins on adjacent tubes. Ihis arrangement is especially desirable, in that it permits the tubes c to be placed closer together, the one above the other, while allowing a wider space between contiguous rows for the passage of the heated gases and products of combustion.

Having vthus described my invention, what I claim as new is- 1. The herein described improved boiler, consisting of the horizontal tire-box section, the vertical rear section, andthe series of tubes attached to and projecting 'from the said vertical section into the uptake, substantially as and for the purpose set forth.

2. In combination with the horizontal fireboX section, the hollow vertical section B, secured to and forming therear wall of said firebox section, and provided at or near its lower end with a passage for` the vproducts of combustion, substantially as described.

8. In combination with the fire-box section A, its grate, and bridge-wall, the vertical section B, secured to the rear end of the fire-box section and provided with an opening below the upper edge of the bridge-wall for the passage ot' the products of combustion, substantially as described.

4. In combination with ahorizontal fire-box boiler-section A and vertical boiler-section B, the latter forming the rear wall of the horizontal section and provided with a passage communicating with the uptake, the series of IOO IIC)l tubes secured to and projecting rearwardly from the verticalv boiler-,section and into th uptake, substantially as described.

5. In a boiler such as described, and in con1-, bination with the vertical section B, constituting one wall of the uptake, the series of tubes passing through the water-walls of said boiler-section and projecting into the uptake, substantially as described. v Y 6. In a boiler such as described, and in combination with the vertical boiler-section B, constituting one wall of the uptake, the series of tubes passing through and connecting the opposite Water-walls of said boiler B and provided with removable caps at one or both ends,

Y substantiallyas described.

7. In a boiler such as described, and -in combination with the'vertical section B, forming one wall of the uptake, the series of tubes passing through the water-walls of said boilersec tion and projecting into the uptake, and` the steam-pipe also located in theuptake and connected to the upper series of tubes, substan-4 tially as described.V

8.l In a boiler such as described, and in com# bination with the vertical boiler-section B and tube-section C, the horizontal fire-box section A, provided with the grate and hollow bridgewall, the latter provided with openings for the v introduction of airrfrom beneaththe grate and its escape into the combustion-chamber, substantially as described.

9. In a boiler such as described, and in conibination with the water-walls thereof, a series lar stay-boltswith their' inner ends open and projecting into the fire-chamber, saidvstaybolts being screwed into the walls of the boiler andtheir outer ends closed tially asdescribed. v 4

11. In a boiler such as described,and in combination with the horizontal fire-box section A, and vertical section B, connected as set by caps, substan-r `forth, the tubes projecting rearwardly from Lthe vertical section into the uptake, each of said tubes being providedfwith a series of conl ducting-pins projecting through itswalls, sub-L stantially as described. Y

12. In a boiler such as described, and in eo'mbination with the vertical section B thereof, the series of tubes with removable caps secured to the walls of said section B, each tube. provided with conducting-pins projecting-radially on opposite sides,leavig the lower surface of Vthe inner wall of the tube unobstructed, sub- 14. In a boiler such as described, and'in comf` v bination with thefvertical section Br and in- Vclosingjwalls forming the uptake, of the series of tubes C, secured to the said section [B and communicating with the interior thereof, -said .tubes arranged to project within the uptake,VK f

being provided with removable caps at oppof" site ends, substantially as described.

i Witnesses: I

ALEX. S. STEUART,

CHAs. R.AB,URR.

MIRABEAU N. LYNN. 

